Conversely, copyright bills, generally printed on less costly paper including wood pulp, soak up the ink immediately, leading to a dark brown or black mark. This speedy shade modify serves as a strong indicator of probable counterfeiting. Some equipment arrive with built-in pens that could detect copyright bills by reacting https://100-dollars-hong-kong33320.blog-eye.com/39217379/details-fiction-and-anti-breeze-chemical